Fin-forming machine.



J. D. BEEBE. PIN FORMING MACHINE. APPLICATION FILED APR. 20, 1910.

Patented Aug. 8, 1911.

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Patented Aug. 8, 1911.

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J. D. BEEBE. FIN FORMING MACHINE. APPLICATION FILED APILZO, 1910.

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UNITED STATES PATENT OFFICE.

JOHN D. BEEBE, OF DETROIT; MICHIGAN.

FIN-FORMING MACHINE.

' forming radiating fins for liquid cooling devices and its object is toprovide a machine for automatically forming from a roll of sheetmaterial radiating fins of any desired length having rows of holes and afolded strengthening edge.

A further object is to provide a convenient adjustment for determiningthe length of the fins and to provide certain other new and usefulfeatures all as hereinafter more fully described reference being had tothe accompanying drawings in which,

Figure 1 is a side elevation of a machine embodying the invention; Fig.2 is a plan view of the lower portion of the same with parts removed;Fig. 3 is an end elevation showing the base in section on substantiallythe line m00 of Fig. 2; Fig. 4 is a detail showing a tripping device fora cutter; Fig.

5 is a sectional detail showing punching,

cutting, and feeding mechanism; Fig. 6 1s a perspective detail of one ofthe cutters; Fig. 7 is an enlarged cross section of the foldersubstantially on the line yg of Fig. 2, showing thefirst step in theprocess of folding; Fig. 8 is a detail illustrating the second step ofthe process of folding; Fig. 9 a similar detail illustrating the thirdstep; and Fig. 10 a detail illustrating the fourth and last step.

vAs shown in the drawing 1 is a suitable bed or base in an opening inthe forward end of which is mounted a suitable frame 2 free to slide inthe opening and supported by angle bars" 3. \Vithin this frame is aseries of rolls for folding the edges of. a

strip of sheet metal which is led to the rolls from a spool or coil notshown. The first rolls 4 and 5 between which the strip of metal passesare formed toturn its edges at an angle of degrees, the lower roll 5being provided with an end flange 6 having a face extending at 'an angleof 45 degrees to the face of the roll, and the upper roll having itsends cut away at a similar angle as at 7 to conform to the said flange.The second set of rolls 8 and 9 between Specification of Letters Patent.

which the strip passes is formed .to turr the edge of the strip upwardat an angle of 90 degrees, the lower roll 9 being pro-" 'vided with aright angle flange 10 and the Patented Aug. 8, 1911.

Application filed April 20, .1910. Serial No. 556,564.

upper roll 8 being of a length to fit bet-ween the end flanges 10 of thelower roll. The third step in the process of folding the edges of themetal strip is performed by the rolls 11 and 12, the lower roll being aplain roll to engage the lower side of the strip and the upper rollbeing formed with a groove 13 near each end having a side or incline 14extending inward at an angle of 45 degrees adapted to engage the edgesof the strip which had been previously turned upward at an angle of 90degrees and turn said edge inward at an'angle of 45 degrees to the upperface of the-strip. The last step in folding the edges is performed bythe rolls 15 and 16, the lower roll 16 being a plain roll and the upperroll 15 being provided with reduced end portions 17 to engage theupstanding edges and fold the same downward, said ends being so reducedthat the edges of the metal will not be compressed tightly downward uponitself at the edges of the strip. A shoulder 18 is provided at the innerend of the reduced portions of the roll to. engage the extreme inneredge of the folded over portions of the strip and compress said edgedown hard upon thebody of the strip which is thus formed with astrengthening bead along each edge to give the strip strength andprevent it from being kinked and bent. Each of the forming rolls is madeup of adjustable sect-ions secured upon a supporting shaft 19 by meansof set screws 20 with spaces between the sections so that by looseningthe set screws the sections may be shifted upon their shaft to lengthenor shorten the roll. Provision is thus made for folding the edges ofstrips of metal of different widths.

Mounted in suitable bearings upon the upper ends of brackets or posts 21and 22 secured to the base 1, is an outer shaft 23 having a tight pulley24 and a loose pulley 25 thereon for the engagement of a suitabledriving belt. Upon this shaft is also secured an eccentric 26, the strap27 of which is pivotally attached to a vertically reciprocable bar 28mounted in bearings upon the bracket 21. To the lower end of the bar 28is detachably secured a head 29 provided with two rows of pins 30 and 31adjustably and detachably secured in the head by means of set screws.

32 is a die secured to the bed 1 and 33 is a block secured upon the dieand provided with openings to" receive and guide the pins. The strip ofmetal as it passes from the folding rolls passes over the die 32 andunder the block 33 and is perforated by the pins 30 and the metal aroundthe perforations is punched downward to form a collar or flange aroundeach perforation, by the second row of pins 31. After passing over thedie 32 and being perforated, the strip of metal passes between cuttingrolls '34 and 35 which have cutting edges engaging the strip of metalalong its longitudinal center line to slit the strip into twoparts.There are preferably ten punches 30 and after the metal is cut by theslitting rolls each strip has five perforations in each transverse row.To draw the strip of metal through the folder over the die and betweenthe slitting rolls, a pin wheel or drum 36 is provided.-

39 are provided with their yielding ends directly beneath the drum 36 ina position to press upward against the under side of'the strip and holdthe-same against the lower side of the drum so that as the drum isturned its pins will engage the perforations.

Secured to the end of the drum 36 is a toothed wheel .40 engaged by aspring hookor dog 41 which. is adjustably secured at its upper end bymeans of a clamping plate 42 to a vertically reciprocable head 43 on abar A spring stop arm 47 is carried by a suitable bracket secured to thebase 1 and en gages the toothed wheel 40 at the opposite side to thatengaged by the dog 41 to prevent the drum from turning backward. As

previously described the frame 2 of the folder is slidablelongitudinally wlthin an opening in the base 1 and attached to thisframe is a coiled spring 48 which-exerts a force to move the frameforwardly or away from the drum 36 so that when the hook 41 movesdownward the drum will be turned backward slightly into firm engagementwith ing of the transverse rows of holes in the strip is insured.

After passing beneath the feed drum 36 the strip passes beneath cuttingknives 49 for cutting the strip into the desired length. Each of theseknives 49 comprise a sliding block 50 mounted in an opening in the bedplate to slide therein and provlded with a shear plate 51 against whichthe pivoted blade 52 acts to cut the strip of sheet metal when the bladeis turned upon its pivotal attachment 53 to the block. There are two ofthese cutters set parallel to each other and when moved apart to theextreme limit of the movement of the blocks 50 in the bed by operatinglevers 78 pivotally attached to the lower side of the blocks, the twoknives will cut close to the perforations of two adjacent I transverserows of openings in the strip, cutting from the strip a piece of metalnearly the width between the rows of holes and leaving each end of thestrip in the same condition, that is, the holes near one end of thestrip will be the same distance from said end as those in the adjacentend of the other strip. By adjusting the blocks 50 toward each other anarrower piece will be cut from the strip between the rows of holestherein and when it is desirable to cut a strip just half way betweenthe rows, one of the cutter blades may be disconnected from theoperating link 54 and the other blade moved to mid position so that itwill cut exactly half Way between the rows of holes in the fin plate orstrip. To so disconnect the knife the pin 55 which has a bearing in thelink and projects through a hole in the upper edge of the knife is firstunlocked by pulling v out a locking pin 56 which locks the pin 55 in itsbearing against endwise movement and then pulling out said pin todisconnect it from the knife.

The link 54 which is attached to and operates the knives or blades 52 ispivotally attached at its upper end to a vertically reciprocable bar 57slidable in a suitable bearing 58 on an arm of the bracket 22. An openframe 59 is pivotally attached to the upper end of the bar 57 and nearits upper end has a slotted guide bearing engaging the projecting end ofthe shaft 23 upon which the frame is guided and is free to slide.Secured upon the shaft '23 within the open frame is a cam wheel 60 andmounted. in the ,7 shaft 61 to normally hold the roller out of alinementwith its cam. A coiled spring 64 is attached to the upper end of theframe 59 at one end and at its opposite end to the supporting arm 65 onthe bracket 22 11011101- mally hold the frame and its connected bar 57and cutter blades ,52 in raised position, with the shaft 23 in the lowerend of the slotted bearing which it has in said frame 59. To assist thespring 64 in lifting the frame 59 and its connected parts into raisedposition, a small roller 66 is mounted in the upper end of the frame 59in a position to be engaged by the cam 60 when the frame is inlowered-position.

Secured to the vertically reciprocable head 43 is an arm or bar 67carrying upon its free end a dog 68 which is normally held in engagementwith a ratchet wheel 69 by a spring 7 0, This ratchet wheel isdetachably secured to a disk 71 rotatably mounted upon a stud 72 on anarm 73 projecting from the bracket 22. A dog 7 4: is pivotedintermediate its ends upon a pin 74* on the arm 73 adjacent to the diskand is normally held by a spring 75 with its upper end in engagementwith one end of the sliding shaft or pin 61..

The lower end of the dog 74 is provided with a lug 76 projectinglaterally therefrom toward the face of the disk 71 which disk isprovided with a pin 77 to engage said lug 76 and operate the dog.

As the head 13 is reciprocated by the turning of the cam 45 to actuatethe hook 41 and turn the feeding drum 36 one notch at a time, the bar 67carried by said head and carrying the dog 68 is also raised and loweredand the ratchet wheel 69 and disk 71 is turned with a step by stepmotion by said dog. The turning of the disk 71 will bring the pin 77into engagement with the dog 74 and actuate the same. The movements ofthe parts are so timed that when the dog is actuated, the small side ofthe cam will be turned toward the roller and thus said dog will whenactuated, shove the roller 62 into alinement with the cam 60 which camengaging the roller will force the frame 59 downward and actuate thecutter knives to sever the fin strip at the proper time. The length ofeach fin strip is therefore determined by the size of the ratchet wheel69, the greater the diameter of said ratchet the greater the number ofstrokes of the reciprocating head to turn the disk 71 a completerevolution and bring its pin 77 into engagement with the dog 74: tooperate the cutters. The ratchet wheel 69 is therefore madedetachable'from the disk 71 and other wheels of different diameters maybe put in its place to determine the number of transverse rows of holeswhich each fin plate will contain and the length of each fin platebeyond its end row of perforations at each end of the plate isdetermined by the adjustment of the j cutters 49.

It is obvious that changes in the construction and arrangement of partsmay be made without departing fromthe spirit of my in vention, and Itherefore do not wish to limit myself to any particular form orconstruction.

Having thus fully described my invention what I claim is 1. Thecombination of punches for forming transverse rows of holes in-a stripof sheet metal, means for intermittently feeding the strip in timedrelation to the movement of the punches, a cutter adapted to sever thestrip transversely between the rows of perforations having two cuttingedges, one at each side of said cutter to cut from said strip atransverse strip of-metal,

ing the strip in timed relation to the movement of the punches, a cuttercomprising parallel cutting members, and means for adjusting saidmembers toward and from each other.

3.'Tl1e combination with punches and means for actuating the same, ofmeans for intermittently feeding a strip of metal in timed relation tothe movement of punches, a cutter comprising parallel cutting members,means for actuating said members in timed relation to the movement ofthe feeding means, and means for detachably attaching one of saidmembers to said actuating means whereby one of said members may bethrown out of operation.

4. The combination of punches and means for actuating the same, of meansfor intermittently feeding a strip of metal, a cutter comprisingparallel cutting members, means for actuating said members to which theyare detachably attached, and means for adjusting said members toward orfrom each other.

5. The combination with punches and means for actuating the same, ofmeans for intermittently feeding a metal strip in timed relation to themovement of the punches, a cutter comprising pivoted cutting bladesextending parallel to each other, a reciprocable member actuated intimed relation to the movement of the punches for actuating the blades,means for detachably connecting said blades to said member," and meansfor adjusting said blades toward or from each other. I

6. The combination with punches and means for actuating the same, andmeans for feeding a strip of sheet metal, of a cutter for severing thestrip transversely, a reciprocable member to which the cutter.isattached for operating the same, a cam, means adapted to be thrown intoand. out of the path of the cam to be engaged thereby and actuate thereciprocable member, and means operating in timed relation to themovement of the feeding means to move said member into the path of saidcam.

7. The combination with punches and means for actuating the same, ofmeans for intermittently feeding a'strip of metal, a cutter for severingthe strip, a reciprocable frame connected to the cutter to actuate thesame, a cam within the frame, a member carried by the frame and adaptedto be moved into the path of the cam to be en-" gaged thereby to movethe frame, and means actuated in timed relation to the actuationf 8. Thecombination with punches and' means for actuating the same, of means forfeeding a strip of metal, reciprocable means for actuating the feedingmeans moved in timed relation to the movement of the punches, a cutter,means for actuating the' cutter comprising a cam and a member adapted tobe moved into the path of the cam to be engaged thereby to actuate thecutter, a dog for moving said member into the path of the cam, and arotatable member actuated by the reciprocation of the reciprocablemember to operate the.dog.

9. The combination with punches and means for actuating the same, of arotatable member for feeding a strip of metal, a reciprocable memberactuated in timed relation to the movement of the punches for turningthe. feeding member, a cutter, means for actuating the cutter comprisinga cam and a member adapted to be moved into the path of the cam to beengaged thereby to actuate the cutter, a rotatable member turned by thereciprocation of the reciprocable member, and means operated by theturning of the rotatable member to move the movable member into the pathof the cam.

10. The combination with punches and means for actuating the same, of arotatable feed member for feeding a strip of metal, a reciprocablemember reciprocated in timed relation to the movement of the punches forturning the rotatable feeding member, a cutter for severing the strip ofmetal, a vertically reciprocable frame connected to the cutter foractuatin the same, a cam within the frame, a roll within the framenormally held out of the path of the cam and adapted to be moved intoposition to be engaged by the cam to actuate the frame, a detachableratchet Wheel, means carried by the reciproe cable member to engage andturn the ratchet wheel, a dog adapted to move the roll into engagementwith the said cam, and means moved by the turning of the ratchet wheelto engage and actuate the dog.

11. The combination with punches for forming transverse rows of holes ina strip of metal and means for actuating the same, of a rotatable memberprovided with peripheral projections to engage the rows of holes in thestrip, means for turning the rotatable member in timed relation to themovement of the punches, a stop to prevent the backward turning of therotatable member, mem-.

bers frictionally engaging said strip and movable in a directionlongitudinally of the strip, and means for yieldingly resisting themovement of said members with the strip when said strip is moved by'gtheturning of said rotatable member.

12. The combination with punches for forming transverse rows of holes ina strip of metal and means for actuatingthe same, of a rotatable memberprovided with peripheral projections to engage the rows of holes in thestrip, means for turning the rotatable member in timed relation to thepunches, a

stop to prevent the backward turning of the rotatable member, a foldercomprising a movable frame, and ,a spring to move the folder in adirection opposite to that in which the strip is fed by the rotatablemember.

13. The combination with punches for forming transverse rows of holes ina strip of metal and means for actuating the same, of a rotatable feeddrum provided with peripheral projections to engage the rows of 'holesin the strip, means for turning the drum with a step by step movement intimed relation to the movement of the punches, a stop for the drum, amovable frame, a series of folding rolls mounted in said frame to engageand fold the strip of material, and a spring to move the frame.

14. The combination with punches and means for actuating the same, ofmeans for feeding a, strip of material in timed relation to the movementof the punches, a cutter comprising movable blocks, blades pivotallyattached to the blocks and movable therewith and having plain adjacentsides, means for adjusting the blocks, and means engaging the blades toactuate the same in timed relation to the feeding means.

15. The combination of a power shaft, punches for forming holes in astripof material, an eccentric on the power shaft for actuating thepunches, a feed drum having projections upon its periphery to engage theholes in the strip, a reciprocable bar, an eccentric on the power shaftto reciprocate the bar, means reciprocable with the bar to turn ment ofthe punches, a cutter, a cam on the In testimony whereof I have aflixedmy POWeIi) 1shaft fordactuatifng the cutter, means signature in presenceof two Witnesses. mova e into an out o the path of the cam I a foractuating the cutter, and means actuated JOHN BEEBE 5 by thereciprocable bar for moving saicl 1 Witnesses:

means into the path of the cam in timed re- ANNA M. SHANNON,

' lation to the movement of the feed drum. LEWIS E. FLANDERS.

